Study on Process Control Characteristics of 22MN Fast Forging Hydraulic Press

Abstract

With the rapid development of modern industry, more and more high requirements for forging velocity and control precision have been proposed. Because it can not only increase productivity, but also can reduce the loss of the workpiece and save raw materials. Due to some characteristics such as high pressure, large flow, heavy moving inertia and so on, the process control performance of the fast forging hydraulic presses often have difficulty in their coordination between rapidity and stability, large shock during pressure relief and flow relief, low control accuracy and high accident rate. To overcome the negative influence and improve forging press performance, it is important to design forging curve. 22MN fast forging hydraulic press adopts electro-hydraulic proportional control system, the simulation and test results approved that the fast forging hydraulic press has high control accuracy and works stably without shock.

Pressure-Relief Impact Control of Open Circuit Hydraulic Pump-Controlled Forging Press System

“…where V0 is the working cylinder oil volume before pressure relief, ΔV is the working cylinder oil compression volume, E is the effective fluid bulk modulus, ΔP is the working cylinder pressure variation, and P is the working cylinder pressure. Since P << E, so E -P ≈ E, and the working cylinder oil compression is, When the hydraulic press system completes the reduction process, it is necessary to quickly release the high pressure oil in the working cylinder before the return stroke, which is called the pressure-relief process [17,18]. If the pressure-relief process is not handled properly, it will cause impact and vibration of the pipeline and frame.…”

Force Characteristics and Mechanical Topology Optimization of Hydraulic Machine Structures: Statics and Dynamics

“…They have developed fast-forging hydraulic equipment with high speed and high-efficiency capabilities, with forging rates up to 180 times/min [18][19][20]. Its movable beam accuracy is controlled within 1 mm, the hydraulic press and other feeding equipment have a high level of coordination technology, and the mechanical equipment fault diagnosis is designed inside the hydraulic press, making it more accurate and convenient to monitor the operating status of the equipment [21][22][23][24].…”